# Dayco vs DENSO Spark Plugs

The clearest difference is review sentiment: DENSO Spark Plugs at 100% against Dayco's 55%. DENSO Spark Plugs also leads on rating (4.7 vs 3.6). Dayco's advantage is update cadence (every 6 weeks vs every 15 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

DENSO Spark Plugs holds the better App Store score, 4.7 against 3.6. Both are backed by a comparable volume of ratings — 11 and 23 respectively. Written reviews point the same way: 55% of Dayco's written reviews are positive against 100% of DENSO Spark Plugs's.

Dayco ships an update every 6 weeks, DENSO Spark Plugs every 15 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Dayco | DENSO Spark Plugs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (11 ratings)](https://appshunter.io/ios/app/dayco/id907476664/reviews) | **[4.7 (23 ratings)](https://appshunter.io/ios/app/denso-spark-plugs/id1499244061/reviews)** |
| Number of ratings | 11 | **23** |
| Positive reviews | 54.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 15 months |
| Monetization | Free | Free |
| Size | 46 MB | 14 MB |
| Requires iOS | 15.6 | **14** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dayco](https://appshunter.io/developer/1202210976) | [Nikaan Nikzad](https://appshunter.io/developer/1465623388) |

## What reviewers say

### Dayco

[App page](https://appshunter.io/ios/app/dayco/id907476664)

This app provides detailed technical information and specifications for automotive spare parts. It serves as a comprehensive catalog for various engine products, drive systems, and services across different vehicle types. Access essential data for automobiles, trucks, construction, and agricultural machinery.

**Highlights:** Technical information on spare parts, Details for engine products, Drive systems specifications, Services for automobiles and trucks, Data for construction and agriculture machinery, Catalog for all market areas

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### DENSO Spark Plugs

[App page](https://appshunter.io/ios/app/denso-spark-plugs/id1499244061)

Find the correct DENSO spark plug for your car by selecting your vehicle model. This app serves as a reference for car owners, mechanics, and sellers to identify suitable spark plug part numbers and their compatibility with various car brands.

**Highlights:** Identify suitable spark plug part numbers, Search by car model, Reference for mechanics, Reference for sellers, Supports numerous car brands

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dayco free?

Dayco is free to download, with no in-app purchases.

### Is DENSO Spark Plugs free?

DENSO Spark Plugs is free to download, with no in-app purchases.

### Which has better reviews, Dayco or DENSO Spark Plugs?

DENSO Spark Plugs is rated higher. Dayco averages 3.6 out of 5 from 11 ratings, while DENSO Spark Plugs averages 4.7 from 23 ratings.

### Do Dayco or DENSO Spark Plugs have ads?

Neither Dayco nor DENSO Spark Plugs shows ads.

### Which is updated more often, Dayco or DENSO Spark Plugs?

Dayco ships an update every 6 weeks, and DENSO Spark Plugs every 15 months. Most recently, Dayco was updated on October 24, 2026 and DENSO Spark Plugs on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*